The utility model discloses an underground pipe gallery fire-fighting device. The fire alarm system comprises at least two fire alarm control devices, the fire alarm control devices are connected through optical fibers. The fire alarm control device comprises an automatic fire alarm device, a fire-fighting linkage fire extinguishing device, a fireproof door monitoring device and an electrical firemonitoring device. The automatic fire alarm device is composed of a smoke sensor, an optical fiber temperature sensor, a manual alarm button and a control module. A fire extinguishing controller, anaudible and visual alarm, a driving device and a pressure switch are arranged on the fire-fighting linkage fire extinguishing device; wherein the fireproof door monitoring device is provided with a door magnetic switch and an electric door closer, the electrical fire hazard monitoring device is provided with a residual current type detector and a temperature measurement type detector, and the automatic fire hazard alarm device, the fire-fighting linkage fire extinguishing device, the fireproof door monitoring device and the electrical fire hazard monitoring device are connected through a CAN bus. The underground pipe gallery fire-fighting device has the functions of automatic monitoring, alarming and prevention and control.